8. r1234: 2 X 6 cell Leftovers. Below: must have 3 and no 8 -> above: must have 3 and no 8
8a. ->21(3)r2c1: no 8 = {579}: locked n4

9. 10(3) = {136}:locked for n4 & r4

10. LoL on r1234: {579/136}:locked above the line -> must be below the line
10a. 7 and 9 locked in r5c58
10b. -> no 7 or 9 in 15(4)(r5c9)
10c. 15(4) must have the 1,3,5,6 for below the line
10d. 15(3) = {1356}
10e. {1356} locked n5